US4743482A - Protective flap for the seam in needle-felts for industrial use - Google Patents

Protective flap for the seam in needle-felts for industrial use Download PDF

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Publication number
US4743482A
US4743482A US06/916,367 US91636786A US4743482A US 4743482 A US4743482 A US 4743482A US 91636786 A US91636786 A US 91636786A US 4743482 A US4743482 A US 4743482A
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US
United States
Prior art keywords
wadding
seam
layer
felt
flap
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US06/916,367
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English (en)
Inventor
Jorgen Johansson
Goran Nohlgren
Erik Nyholm
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Scandiafelt AB
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Scandiafelt AB
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Filing date
Publication date
Application filed by Scandiafelt AB filed Critical Scandiafelt AB
Assigned to SCANDIAFELT AB reassignment SCANDIAFELT AB ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: JOHANSSON, JORGEN, NOHLGREN, GORAN, NYHOLM, ERIK
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Publication of US4743482A publication Critical patent/US4743482A/en
Anticipated expiration legal-status Critical
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Classifications

    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/44—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling
    • D04H1/46—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling by needling or like operations to cause entanglement of fibres
    • D04H1/498—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling by needling or like operations to cause entanglement of fibres entanglement of layered webs
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F7/00—Other details of machines for making continuous webs of paper
    • D21F7/08—Felts
    • D21F7/083—Multi-layer felts
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F7/00—Other details of machines for making continuous webs of paper
    • D21F7/08—Felts
    • D21F7/10—Seams thereof
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/19—Sheets or webs edge spliced or joined
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/19—Sheets or webs edge spliced or joined
    • Y10T428/192—Sheets or webs coplanar
    • Y10T428/197—Sheets or webs coplanar with noncoplanar reinforcement
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24058—Structurally defined web or sheet [e.g., overall dimension, etc.] including grain, strips, or filamentary elements in respective layers or components in angular relation
    • Y10T428/24124—Fibers

Definitions

  • This invention concerns a protective flap in one or several layers, the uppermost layer being of wadding, which flap covers the releasable seam in needle-felts to be used in machines, as press felts, drying felts, conveyor belts or felts.
  • Endless felts are used in paper machines in order to convey and support the wet and weak web through the presses and the press section.
  • Felts are also used in the drying section--specifically in marking sensitive positions--in order to convey the web through the drying section, whereby the web is pressed by the felt against heated cylinders.
  • One of the most important requirements of the felts is that they do not give impressions on the wet web. Such felts have therefore earlier been furnished endless even if this has made it more difficult to mount them in the paper machine. Drying felts have for many years been provided with a seam in order to facilitate the mounting in the paper machine and during the last three years also the press felts have been provided with such a seam.
  • the seam is covered by a wadding flap, which is a continuation of the wadding layer which is fastened to the felt.
  • the wadding flap is worn in different ways when the felt is used in the paper machine and its firmness will therefore decide the limit for the effective lifetime of the felt and marking in the web will occur due to the wearing of the wadding flap.
  • Felts which are provided with the above-mentioned seams are so called needle-felts which have a substrate on which a fibrous web, a layer of wadding is fastened.
  • the layer of wadding is usually produced from carded fibrous web, which is placed transversely by an operating means with a breadth, which is in accordance with that of the substrate.
  • the wadding layer is fastened to the substrate by several needles having downwardly directed hooks which penetrate the wadding layer and the substrate so that the fibers of the wadding layer are drawn downwardly between the yarns of the substrate and are fastened.
  • the fibers of the wadding layer and of the so formed wadding flap over the seam are given a direction, which mainly is transverse to the longitudinal direction of the felts or the moving direction in the machines.
  • the strength in the operating direction will be very low. Fibers very often become loose by strains in the paper machine and the wadding flap can after a certain time fail to fulfil its function as a cover over the seam for preventing marking of the web.
  • a bad or worn out wadding flap in the press section will result in: a risk of marking, breakage of the web, disturbing of the operation of the press, disturbing of the vacuum system and the fiber passage.
  • the elements in the press section which are wearing on the wadding flap are: suction boxes, HT-strips, press cylinders and guiding rollers.
  • a wadding flap which is bad or worn out in the drying section will result in: risk of marking, breakage of the web and air leakage at so called ejector blowing boxes.
  • Matters which have influence on the strength of the wadding flap in the drying section are: wear of the cylinders and the guiding rollers, chemical degradation and hydrolysis and air blowing for cleaning.
  • the object of the invention is to provide a protective flap, which is so formed that the wear on it is decreased, in order to obtain a better felt and a safer production of paper.
  • the invention is characterized in that the protective flap includes at least one layer, the fibers, yarns or filaments of which are mainly oriented longitudinally in the moving direction of the felt in the machine.
  • FIG. 1 is a schematic longitudinal view of a known felt having layers of wadding and a protective flap;
  • FIG. 2 is a v similar to FIG. 1 of a felt according to the invention.
  • FIG. 3 is a view similar to FIG. 2 showing a second embodiment of the invention n;
  • FIG. 4 is a schematic view similar to FIG. 2 of the protective flap formed in order to be able to fasten by needling.
  • the felt according to FIG. 1 includes a substrate 1, which has a transversal seam 2, which consists of usual locking loops and locking thread.
  • the layer 3 of wadding having transversal fibers is needled to the upper side of the substrate.
  • the so called protective flap 4 is placed in the area above the seam and to the left of broken line 14 denoting the cut which forms the flap 4.
  • FIG. 2 shows an embodiment of the invention, whereby the felt includes substrate 1 and the seam 2.
  • a layer 5 of wadding having transversal fibers is placed upon the substrate.
  • a layer 6 of wadding having longitudinal fibers mainly oriented longitudinally in the direction of movement of the felt is placed upon the layer 5.
  • the layers themselves may include several layers.
  • the layer 6 having longitudinal fibers does not need to pass around the entire felt but it is necessary that the layer is placed within the area closest to the seam 2 i.e., layer 6 is provided at least in the area of the flap.
  • FIG. 3 A modified emodiment is shown in FIG. 3.
  • the layer 5 of wadding having transversal fibers.
  • the woven fabric or the non-woven fabric 7 has the main part of the fiber material oriented longitudinally in the longitudinal direction of movement of the felt.
  • a further layer 8 of wadding having its fibers oriented in the transversal direction, or in longitudinal direction is then placed on the woven fabric 7.
  • the fibers in the layer having the fibers oriented longitudinally moving in the direction may partly or completely be exchanged with other fibers than those which are included in wadding.
  • the exchanged fibers may be stronger or have a better chemical or heat resistance. Fibers having greater length may also be used and also, e.g., multifilament fibers may be used.
  • the disengaged flap of wadding has sufficient strength so that the structure is maintained when the felt is being mounted in the paper machine. After the felt has been mounted in the machine and the seam 2 has been locked, the felt is placed in the right position over the seam and is fastened on the same place as it was disengaged by needling down into the felt with a portable needling machine having a certain amount of needles. There is a smaller risk for damages and wear on this needled flap than when the flap is free.
  • the invention is not limited to needle felts in paper machines, but can be adopted for needle felts which have lockable seams and are used as endless, e.g. as in conveyor belts and felts.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Paper (AREA)
  • Nonwoven Fabrics (AREA)
  • Woven Fabrics (AREA)
  • Secondary Cells (AREA)
  • Furan Compounds (AREA)
US06/916,367 1985-10-11 1986-10-07 Protective flap for the seam in needle-felts for industrial use Expired - Lifetime US4743482A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE8504734A SE447140B (sv) 1985-10-11 1985-10-11 Skyddsflik for skarven vid nalade filtar for industriellt bruk
SE8504734 1985-10-11

Publications (1)

Publication Number Publication Date
US4743482A true US4743482A (en) 1988-05-10

Family

ID=20361710

Family Applications (1)

Application Number Title Priority Date Filing Date
US06/916,367 Expired - Lifetime US4743482A (en) 1985-10-11 1986-10-07 Protective flap for the seam in needle-felts for industrial use

Country Status (8)

Country Link
US (1) US4743482A (de)
EP (1) EP0218569B1 (de)
AT (1) ATE76914T1 (de)
CA (1) CA1273838A (de)
DE (1) DE3685539T2 (de)
ES (1) ES2002518A6 (de)
FI (1) FI85396C (de)
SE (1) SE447140B (de)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4902383A (en) * 1988-04-05 1990-02-20 Asten Group, Inc. Method of making a papermaker's felt with no flap seam
US4913947A (en) * 1989-02-01 1990-04-03 The Orr Felt Company Seam for papermaker's felt
US4939025A (en) * 1989-02-01 1990-07-03 The Orr Felt Company Papermaker's felt with flex joint seam for pin
US4938269A (en) * 1989-02-01 1990-07-03 The Orr Felt Company Papermaker's felt seam with different loops
US5175037A (en) * 1989-05-02 1992-12-29 Thomas Josef Heimbach Gmbh & Co. Belt for papermaking machines
GB2357756A (en) * 1999-12-24 2001-07-04 Pilkington Plc Forming belt for shaping glass
WO2002033170A1 (en) 2000-10-18 2002-04-25 Voith Fabrics Heidenheim Gmbh & Co. Kg Papermachine clothing
US7267745B2 (en) 2004-09-03 2007-09-11 Voith Fabrics, Inc. Papermakers felt having a point-bonded web layer formed of coarse fibers
US20150308045A1 (en) * 2014-04-25 2015-10-29 Huyck Licensco, Inc. Seamed papermaker's press felt with reinforced batt layer

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB8707473D0 (en) * 1987-03-28 1987-04-29 Scapa Porritt Ltd Papermachine clothing
GB2289648B (en) * 1994-05-26 1997-10-15 Scapa Group Plc Corrugator fabric
AT402516B (de) * 1995-08-28 1997-06-25 Huyck Austria Gewebeband-einrichtung
DE102006039102A1 (de) 2006-08-19 2008-02-21 Voith Patent Gmbh Trockenband für eine Trockensektion einer Maschine zur Herstellung von Bahnmaterial, insbesondere Papier oder Karton

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4427734A (en) * 1982-04-19 1984-01-24 Albany International Corp. Wet press felt for papermaking machines
US4500588A (en) * 1982-10-08 1985-02-19 Tamfelt Oy Ab Conveyor felt for paper making and a method of manufacturing such a felt

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3392079A (en) * 1964-05-22 1968-07-09 Huyck Corp Papermakers' felt
DE1958335A1 (de) * 1969-11-20 1971-05-27 Marx Gmbh J J Genadeltes Faservlies mit synthetischen Fasern fuer die Papierindustrie und aehnliche Verwendungszwecke
SE429982C (sv) * 1982-11-02 1985-11-18 Nordiskafilt Ab Filt med oglesom for presspartiet i en pappersmaskin samt forfarande for dess framstellning

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4427734A (en) * 1982-04-19 1984-01-24 Albany International Corp. Wet press felt for papermaking machines
US4500588A (en) * 1982-10-08 1985-02-19 Tamfelt Oy Ab Conveyor felt for paper making and a method of manufacturing such a felt

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4902383A (en) * 1988-04-05 1990-02-20 Asten Group, Inc. Method of making a papermaker's felt with no flap seam
US4913947A (en) * 1989-02-01 1990-04-03 The Orr Felt Company Seam for papermaker's felt
US4939025A (en) * 1989-02-01 1990-07-03 The Orr Felt Company Papermaker's felt with flex joint seam for pin
US4938269A (en) * 1989-02-01 1990-07-03 The Orr Felt Company Papermaker's felt seam with different loops
US5175037A (en) * 1989-05-02 1992-12-29 Thomas Josef Heimbach Gmbh & Co. Belt for papermaking machines
GB2357756A (en) * 1999-12-24 2001-07-04 Pilkington Plc Forming belt for shaping glass
GB2357756B (en) * 1999-12-24 2003-12-31 Pilkington Plc Forming belt
WO2002033170A1 (en) 2000-10-18 2002-04-25 Voith Fabrics Heidenheim Gmbh & Co. Kg Papermachine clothing
US20040033748A1 (en) * 2000-10-18 2004-02-19 Crook Robert L. Papermachine clothing
US6998023B2 (en) 2000-10-18 2006-02-14 Voith Fabrics Heidenheim Gmbh & Co. Kg Papermachine clothing
US7267745B2 (en) 2004-09-03 2007-09-11 Voith Fabrics, Inc. Papermakers felt having a point-bonded web layer formed of coarse fibers
US20150308045A1 (en) * 2014-04-25 2015-10-29 Huyck Licensco, Inc. Seamed papermaker's press felt with reinforced batt layer

Also Published As

Publication number Publication date
CA1273838A (en) 1990-09-11
SE447140B (sv) 1986-10-27
EP0218569A2 (de) 1987-04-15
EP0218569B1 (de) 1992-06-03
FI863967L (fi) 1987-04-12
SE8504734D0 (sv) 1985-10-11
FI85396B (fi) 1991-12-31
FI863967A0 (fi) 1986-10-01
DE3685539D1 (de) 1992-07-09
ES2002518A6 (es) 1988-08-16
ATE76914T1 (de) 1992-06-15
FI85396C (fi) 1992-04-10
EP0218569A3 (en) 1989-10-25
DE3685539T2 (de) 1993-04-29

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Owner name: SCANDIAFELT AB, S-640 10 HOGSJO SWEDEN

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